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Screen Brightness only changeable through /sys/class/intel_backlight

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https://bbs.archlinux.org – Hmmm, I'm having the same problem. I recently picked up an old Acer Aspire S3 ultrabook, I'm using a freash install of arch with xfce4 and I havent been able to get the xfce4-brightness-plugin to work.Changing the appropiate values in /sys/class/backlight/acpi_video0/ (which is what the plugin does aswell) does nothing, but I can adjust brighness by changing the appropiate values in /sys/class/backlight/intel_backlight/ (though I must be logged in as root, sudo does not work)Even after speding a fair ammount of time on this, I'm actualy not too clear how this is all ment to work (HowTos)